Tilting mechanism



March 25 1924; 11,487,890 l A. w. RYBECK TILTING MscHANIsM 'Filed'A'pril 1e, 1923 Fatented lil/lar. 25, 192131.

tra srs PATENT FH.

ADOLT W. RYBECK, 0F MILWAUKEE, WISCONSIN, ASSIGNOR TO THE T. L. SMITH COMPANY, OF MILWAUKEE, WISCONSIN, A CORPORATION 0F WISCONSIN.

TILTING- MECHANISM.

Application filed April 16, 1923. Serial No. 632,300.

To all whom t may concern:

Be it known that l, ADoLrH W. RYBEGK, a subject of the Kingdom of Sweden, residing at Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Tilting Mechanism, of which the following is a specification.

This invention relates to a new and imroved tilting mechanism and more particuarly to a mechanism adapted for use in operating concrete mixers of the tilting type.

As is well known in the art, certain types of concrete mixers are tilted in order to direct downwardly an axial opening and to thus discharge the mixed batch of concrete. With large mixers this tilting is accomplished through gear trains and similar mechanism to handle the heavy load.

It is an object of the present invention to provide tilting mechanism adapted for use with smaller sizes of mixers which may be readily operated by means of hand levers.

It is a further object to provide mechanism of this character adapted to automatically stop tilting movement at the proper point and to maintain the mixer in discharging position until released therefrom.

It is a further object to provide mechanism of this character adapted to prevent reverse tilting of the mixer.

It is an additional object to provide mechanism which is simple in design and construction, and rapid and ecient in operation.

ther and further objects will appear as the description proceeds.

I have illustrated a preferred embodiment of my invention in the accompanying drawin s in which:

igure l is a side elevation of the mixer equipped with my invention;

Figure 2 is a'section taken on of Flgure 1; and

Figure 3 is a view similar to Figure 2 but showing the mixing drum in tilted position.

The trailer and mixer shown form no part of the present invention, but have been shown for purposes of illustrating the application of the invention. The mixing drum 11 is supported from the swinging member 12, which latter is suspended from trunnions fitting in the end supports 13 and 14. The lower portions of these supports 13 and 14 are secured to the longitudinal line 2 2 members 15 and 16 to form the frame of the trailer. This trailer is carried upon wheels 17 and, as shown, is supported at one end when halted by means of the stand 18.

The drum 11 is supported from member 12 by means of rollers 19 and is driven by gear 20 meshing with rack 21. The gear 20 is upon a shaft extending through the trunnion and through the bearing member 14 and driven vby a gas engine enclosed in housing 22.

When loading the mixing drum, the mixer is in the position shown in Figure 2, and the constituents of the concrete are introduced through an opening in the end 23 of the drum. When discharging the mixed concrete, the member 12 carrying the drum is swung about the trunnions to the position shown in Figure 3, and the concrete is discharged through the opening 24. It is essential that the drum do not swing in the reverse direction beyond the position shown in Figure 2, under impact of the material as it 1s introduced into the loading opening 23.

My tilting mechanism comprises the lever 25 which is pivotally secured at 26 to the support 14. The upper end of/ the lever is provided with the handle 27 .for manual operation. The lower end of th/e lever is bifurcated and pivotally connect/ed to the link 28. The opposite end of this link is pivotally connected at 29 to yhe member 12. The link 28 is provided upo its upper surface with the lug 30 which, als shown in Figure 2, engages the lever 25 to prevent reverse movement or clockwise movement'ot` the lever beyond the position-shown in Figure 2.

The link 28 is also provided upon its under surface with thelug 31 which is adapted to engage the lever 25 as shown in Figure 3 to prevent movement of the link and lever beyond a predetermined discharging position of the drum. It will be noted that in the position shown in Figure 3, the lever and link are beyond a dead center so that the weight of the mixing drum serves to thrust the lug 31 against the lever 25 and this action maintains the parts in the discharging position.

In the operation of my device, the parts and drum are normally in the position shown in Figure 2. After the material in the mixer drum has been thoroughly mixed,

the upper end of lever is swung forwardly and downwardly ,to the' position shown in Figure 3. The material is then discharged from the drum by gravity as the drum continues to rotate.

As has been stated, the weight of the drinn maintains the parts in the position shown in Figure 3. After the material is discharged, the free end of the lever 25 is raised to carry the lever and link beyond a dead center and the weight of the drum quickly swings the parts to the position shown in Figure 2. The lug engages lever 25 to prevent the return movement from going beyond the proper point.

It will be understood that the weight of the drum and its supporting member 12 are so distributed about the axes of the trunnions that no very great force need be applied to tilt the drum. Similarly, but small force is needed to carry the link and. lever beyond the dead center to permit the drum to swing to the normal position.

The tilting mechanism construction shown is composed of but two parts and is simple in design and construction. It permits rapid movement from discharging to loading positions bythe single motion of ahand lever without employing excessive force. It willfbe understood that this tilting construction may be applied to other forms of mixers or apparatus than that shown and I contemplate such modifications to meet varying conditions as may come within the scope of the appended claims.

I claim:

1. In combination with a tilting concrete mixer or the like, tilting mechanism comprising a lever and a link pivotally connected together, one of said members being pivotally connected to a fixed mixer support and the. other being pivotally connected to a swinging portion of the mixer, and means limiting pivotal movement between the lever and link at a point in their movement beyond a dead center.

2. In combination with a tilting concrete mixer or the-like, tilting mechanism comprising a lever pivotally connected to a rigid mixer support, a link pivotally connected'to a swinging portion of the mixer, a pivoted connection between the link and lever, and means limiting pivotal movevment between the lever and link at a point in their movement. beyond a dead center whereby the mixer may be maintained in tilted position.

3. In combination with a tilting concrete mixer or the like, tilting mechanism comprising a lever pivotally connected to a rigid mixer support, a link pivotally. connected to a swinging portion of the mixer,

` a. pivoted connection between the link and lever, and means limiting .'pivotal movement between the lever and link at a point in their movement when the mixer is horizontal whereby reverse tilting of the mixer is prevented.

4. In combination with a tilting concrete mixer or the like, tilting mechanism comprising a lever pivotally connected to a rigid mixer support, a link pivotally connected to a swinging portion of the mixer, a

ivoted connection between the link and ever, and means limiting pivotal movenient between the lever and `link at a point in their movement beyond a dead center whereby the mixer may be maintained in tilted position, and at a point in their movement when the mixer is horizontal whereby reverse tilting of the mixer is prevented.

5. In combination with a'tilting concrete mixer or the like, tilting mechanism comprising a lever pivotally connected to a rigid mixer support, a link pivotally connected to a swinging ortion of the mixer a pivoted connection between the link and lever, and lugs on the link adapted to engage the lever to limit pivotal movement between the members.

6. In combination with a tilting concrete mixer or the like, tiltin mechanism comprising a, lever and a llnk pivotally connected together, one of said members being pivotally connected to a fixed mixer support and the other being pivotally connected to a swinging portion of the mixer, and lugs on one of said members adapted to engage the other member to limit pivotal movement between the members.

7 In combination with a tilting concrete mixer or the like, tilting mechanism comprising a lever pivotally connected to a rigid mixer support, a link pivotally connected to a swinging ortion of the mixer, a pivoted connection between the link and lever, the elements being related in Such manner that forward and downward movement of the free end of the lever serves to thrust the lower portion of the mixer rearwardly by means of the link, and interengaging portions of the link and lever whereby such movement is stopped past a dead center and the mixer maintained in tilted position.

8. In combination with a tilting concrete mixer or the like, tilting mechanism comprising a lever pivotally connected to a rigid mixer support, a link pivotally connected to a swinging ortion of the mixer a pivoted connection tween the link and lever, the elements being related in such manner that forward and downward movement of the free end of the lever sei/ves to thrust the lower portion of the mixer rearwardly by means of the link, interengaging portions of the link and lever whereby such movement is stopped past a dead center and the mixer maintained in tilted position, and further interengaging portions oi"- the lever and link whereby rearward movement of the lever from normal position and consequent reverse tilting of the mixer are prevented.

9. In combination with a tilting mixer having a drum swung below spaced trun-` wnrdly and upwardly about the mixer trunnions.

10. In combination with a tilting mixer having a drum swung below spaced trunnions, tilting mechanism comprising a-lever pivotally connected to a trunnion s upport, a link pivotally connected to sw1ngmg portion of the mixer at a point below the -trunnion pivot, a pivoted connection between the link and lever, whereby forward movement of the free end of the lever serves to swing` the link and lower portion rearwardly and upwardl about the mixer trunnions, and a lug on t e link adapted to engage the lever to stop said rearward movement at a redetermmed point.

Signed at ilwaukee, Wisconsin, this 12th day of April, 1923.

ADOLPH W. RYBECK. 

